[Haskell-cafe] GADTs: the plot thickens?

Pablo Nogueira pirelo at googlemail.com
Wed Jan 31 07:57:14 EST 2007


> Now we modify thin to take an extra Nat n (not needed, but just to
> show the duality with thickening):

I'm puzzled by the "not needed" bit. Isn't the introduction of  Fin's
indices reflected as values in  the GADT , and the fact that the GADT
makes that reflection, what makes it work?


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